Update README to be consistent with clients

Author: weppos

README.md

@@ -60,29 +60,9 @@ TOKEN=[TOKEN VALUE GOES HERE] node test.js
 
 Take a look at [https://github.com/dnsimple/hello-domains-node](https://github.com/dnsimple/hello-domains-node) for an example app that authorizes via OAuth and displays your domain list.
 
-## Pagination
-
-There are helper submethods available on API methods that are paginated to assist with fetching items across all pages.
-
-For an API that returns a `paginate` property, you can use either the `iterateAll` or `collectAll` submethods:
-
-- **iterateAll**: return an asynchronous iterator of items that are returned from the API. When the last item on a page is iterated, the next page will be fetched. This continues until there are no more pages.
-
-- **collectAll**: fetch all pages and collect all the items in order into an array.
-
-Examples:
-
-```typescript
-// iterateAll
-for await (const certificate of client.certificates.listCertificates.iterateAll(1010, "bingo.pizza")) {
-  console.log(certificate);
-}
-// collectAll
-const certificates: Array<Certificate> = await client.certificates.listCertificates.collectAll(1010, "bingo.pizza");
-console.log(certificates.length);
-```
+## Configuration
 
-## Sandbox Environment
+### Sandbox Environment
 
 We highly recommend testing against our [sandbox environment](https://developer.dnsimple.com/sandbox/) before using our production environment. This will allow you to avoid real purchases, live charges on your credit card, and reduce the chance of your running up against rate limits.
 
@@ -98,7 +78,7 @@ const client = new DNSimple({
 
 You will need to ensure that you are using an access token created in the sandbox environment. Production tokens will *not* work in the sandbox environment.
 
-## Setting a custom `User-Agent` header
+### Setting a custom `User-Agent` header
 
 You customize the `User-Agent` header for the calls made to the DNSimple API:
 
@@ -112,6 +92,27 @@ const client = new DNSimple({
 
 The value you provide will be appended to the default `User-Agent` the client uses. For example, if you use `my-app`, the final header value will be `dnsimple-node/x.x.x my-app` (note that it will vary depending on the client version).
 
+## Pagination
+
+There are helper submethods available on API methods that are paginated to assist with fetching items across all pages.
+
+For an API that returns a `paginate` property, you can use either the `iterateAll` or `collectAll` submethods:
+
+- **iterateAll**: return an asynchronous iterator of items that are returned from the API. When the last item on a page is iterated, the next page will be fetched. This continues until there are no more pages.
+
+- **collectAll**: fetch all pages and collect all the items in order into an array.
+
+Examples:
+
+```typescript
+// iterateAll
+for await (const certificate of client.certificates.listCertificates.iterateAll(1010, "bingo.pizza")) {
+  console.log(certificate);
+}
+// collectAll
+const certificates: Array<Certificate> = await client.certificates.listCertificates.collectAll(1010, "bingo.pizza");
+console.log(certificates.length);
+```
 
 ## Contributing